Interlift ILP Series Operating instructions

1
Interlift Inc.
15939 Piuma Avenue
Cerritos, CA 90703
Phone: [phone]
Fax: [phone]
Email: [email protected]
ILP - Series
Troubleshooting: ILP – Dual Cylinder Folding Unit
Table of content: Page
1) Gate overview ………………………………………....2
2) Gate does not lower down…………………………….3
3) Gate is not lifting up……...…………………………….4
4) Electrical schematic……………………………………5
5) Hydraulic schematic…………………………………...6
Tools needed:
1.) Voltmeter
2.) Test light
3.) 8” jumper cable (16ga. or smaller)
4.) Screw driver flat head
5.) 13mm (1/2”) wrench
*****MAKE SURE YOUR BATTERIES ARE FULLY CHARGED
AND IN GOOD CONDITION*****
Always use CAUTION and
allow SAFE distance from moving parts
Practice SAFETY, using common sense
and good judgment

2
Gate overview
Stored position
Folding process
Unfolded Gate

3
Interlift Inc.
Phone: [phone]
Fax: [phone]
Email: [email protected]
ILP
Series
1) GATE DOES NOT LOWER DOWN
1.1) Check Battery Power
a) Check if Cab Cut of switch is pulled out – “ON” position
b) Check resettable Circuit Breaker on top of batteries ÆPush Reset Tab back in, if popped out
b) Check fuse at pump & motor (qty 1) in box for hydraulic power unit
c) Start truck and run engine in fast idle for charging the battery
Æif lift gate starts working, recharge batteriesÆtest batteries and truck/trailer charging system
d) Check for a solid ground connection from the motor post to box of hydraulic power unit
1.2) Check controls
a) Check the valves visually for mechanical damage – bent or damaged ??
b) Open up Lid at hydraulic power unit and unplug red cable #2 with the inline fuse.
c) Unplug cable #6 to both 2 wire release valve harnesses.
d) Connect female end #2 and male end #6 to energize release valves.
a) Gate is lowering down – check switch and grey 3 wire harness to switch for damaged spots
b) Gate is not lowering down
a) Check both release valve wirings for damaged spots
b) Unscrew plugs of valves – stick voltmeter or test light into connectors and hit the down
function - each valve at a time.
a) See light or read voltage – cable is ok
b) See no light or 0 V – damaged wire
c) Remove plastic cap of release valves – keep coil in place - and hold a screwdriver
close to steel valve stem while hitting the down function – screwdriver did not get
magnetically pulled towards valve, bad coil.

4
Interlift Inc.
Phone: [phone]
Fax: [phone]
Email: [email protected]
ILP
Series
1) GATE DOES NOT LIFT UP
1.1) Check Battery Power
a) Check if Cab Cut of switch is pulled out – “ON” position
b) Check resettable Circuit Breaker on top of batteries ÆPush Reset Tab back in, if popped out
b) Check fuse at pump & motor (qty 1) in box for hydraulic power unit
c) Start truck and run engine in fast idle for charging the battery
Æif lift gate starts working, recharge batteriesÆtest batteries and truck/trailer charging system
d) Check for a solid ground connection from the motor post to box of hydraulic power unit
1.2) Check controls
a) Check the valves visually for mechanical damage – bent or damaged ??
b) Open up Lid at hydraulic power unit and unplug red cable #2 with the inline fuse.
c) Jump female end #2 to small positive connector (switch cable #5 attached) on motor solenoid.
WARNING – Do not stay between platform and truck body – gate will raise up
d) Gate is raising up – check switch and grey 3 wire harness to switch for damaged spots
a) Gate is not raising up
a) Check motor solenoid for proper function – hear clicking??
a) No clicking – motor solenoid or thermo switch at motor is bad
b) Hear clicking – check for voltage on both big positive stud to ground
a) Have Voltage – solenoid is ok
b) No voltage – solenoid is not connecting internally – bad solenoid
b) Motor solenoid is ok
a) Check for power on large positive motor stud
a) Have power – bad motor or bad brushes
b) No power at motor stud – Check connection to solenoid

5
Electrical schematic
15 A fuse
2 hot control power from fuse 4 control power from on-off switch 5 up function 6 down function
4
4
2
2
6
6
5
control wire description
ground stud
Pump unit
6 down
5 up
Release
valvex2
@cylinder
Control Power
hot from fuse
6 down Release Valve
5 up Motor Solenoid
Up & Down
Switch
Cab cut-off
switch

6
Hydraulic schematic
Functions:
Lift: M
Lower:S1+S2
Pressure Relief
2850 PSI
200 bar
Restrictor Valve R5
Flow Divider
Functions:
S1 and S2 = Release Valve for lowering function
R1 and R2 = Flow Restrictor located inside hose adaptor on lift cylinder
R5 = Restrictor Valve located in power pack
Flow Divider is activated, when fluid is going back into the power pack
If Flow Divider is loose or hanging up the fluid is circulated back in to tank
Access for
pressure gauge